I don't think there is much to be expected especially if it's used with the same sensor and hardware with the same limitations. firmware can do only as much as what the hardware's capacity. when I read that there wasn't much of a change in hardware, it was meant to perform like what was announced. besides, the NX20 was supposed to be released last year alongside the NX200.

personally, I'm not really sad with that fact as long as I still get the same results that I'm getting from the NX200 with the 1.04 which are more refined now in LR4. I also noticed some slightly better DR as well so it's very nice indeed. of course, a higher bit data would be nice, but I think that could be in the next generation of NX cameras and hopefully 16bit instead and with a better processor. I'm still looking for the first mirrorless camera which I hope I could use for action.